Cutting mechanism.



- C. F. SMITH.

CUTTING MECHANISM.

APPLICATION FILED JAN. 3. 1912.

1,071,473 Patented Aug. 26, 1913.

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CUTTING MECHANISM.

APPLICATION FILED JAN. 3. 1912.

Patented Aug. 26, 1913.

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APPLICATION FILED JAN. 3, 1912.

Patented Aug. 26,191

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CHARLES E. SMITH, OF BRIDGEPORT, CONN EG'IICUT, ASSIGNOR TO HOWLAND BAG AND PAPER COMPANY, OF DEXTER, NEW YORK, A CORPORATION OF NEW YORK.

CUTTING MECHANISM.

Specification of Letters Patent.

Patented A110. 26,1913.

Application filed January 3, 1912. Serial No. 669,216.

ed'certain new and useful Improvements in.

Cutting Mechanism, of which the following is a specification.

This invention relates to cutting mechanism, and particularly to mechanism of that class adapted for severing tubular webs into blanks of predetermined length, such as may be suitable for afterward forming into paper bags.

The object of my improvements is to provide a mechanism of the class specified, of simple construction, and which may be adjustable for dilferent lengths of blanks.

To these ends my improvements comprise parts and combinations of parts set forth herein and illustrated in' their preferred form in the drawings accompanying this specification.

Figure l is a side elevation, looking in the direction of arrow 1, Fig. 3, of a cutting mechanism embodying my improvements. Fig. 2 is a fragmentary side elevation look ing in the direction of arrow 2, Fig. 3. Fig. 3 is a vertical section on line 3, 3, Fig. 1, looking in the direction of arrow 5. Fig. 4 is a fragmentary cross section on line 4, 4, Fig. 3, showing the cutting members of my improved mechanism in operative coaction. Fig. 5 is a similar view to that'of Fig. 4, but showing said cutting members in their return strokes. Fig. 6 is a plan view looking in the direction of arrow 6, Fig. when the cutting members are in approximately the same vertical plane. Fig. 7 is a fragmentarv end view to an enlarged scale looking in the direction of arrow 4, Fig. 4. Fig. 8 is a fragmentary end view on an enlarged scale, looking in the direction of arrow 8, Fig. 5. Fig. 9 is a fragmentary plan view of a portion of what is shown in Figs. 7 and 8 and to the same scale as-those figures. Fig. '10 is a diagrammatic view of the path of one of the cutters relatively to the float. Figs. 11 and 12 are modified forms of the path shown in Fig. 10. Fig. 13 is a fragmentary sectional elevation of a modification of the crank mechanism parts as shown in Fig. Figs. 14 and 15 are respectively a sectional elevation andan end elevation of portions of What is shown in F igs. 3 and 2 respectively.

M y improved mechanism is convenlentlv mounted in side frames 9, 10, provided With the usual bearings as 11, for the several shafts. Main shaft 12 has pulley 13 on the outboard right hand end, Fig. 3. Said pulley is omitted from the showing of Fig. 1, in the interest of clarity. Change gear 14 is mounted on said main shaft 12 between pulley 13 and bearing 15 of frame 10. Said gear and pulley are connected for rotation with shaft 12 by key 16. Revolnbly mount ed on shiftable stud 17 in swinging arm 18,

pivotally mounted on extension 19 of hearing 15, first intermediate gear 20 is driven by gear 14 and in turn drives second intermediate gear 21. Said gear 21 is rotatably mounted on stud 22 fixed in frame 10, and drives lower feed roll gears 23 and 25 fixed to shafts 29, 31, respectively. Said lower feed roll gears drive 11 iper feed roll gears 24 and 26, fixed to sha ts 30, 32, all respecti vely. Swinging arm 18 may be held in adjusted position by means of clamp-bolt 27 passing through slot 28 of said arm and engaging frame 10 in the well known manner. Feed rolls 33, 34 fixed to shafts 29, respectively and feed rolls 36 fixed to shafts 31, respectively are etlicient for supporting float 37 and for advancing a. continuous tubular Web thereover in the direction of arrow 5 in the usual manner, well known in the art.

Cutter shafts 39, 40 are mounted for oscillation in opposite sleeves, as 41, 42 for shafts 39 and 43, 44 for shaft 40. Lower cutter shaft sleeves 43, 44 have gears 45,46 fixed thereto respectively and are driven in unison in clockwise direction (Fig. 1) by gears 47. 48 1-espcctively fixed to main shaft-12 (Fig. 3). Upper sleeves 41, 42 have gears 49, 50 fixed to the inner ends thereof above and in mesh with gears 45, 46, all respectively. .Said sleeves 41,42 are thus driven in anti-clockwise direction (Fig. 1). Sleeves 41, 42 and 43, 44 are eccentrically bored, thereby causing shafts 39, 40 to move bodily through eccentric paths. Said sleeves are set relatively to one another to cause said shafts to approach one another simultaneously and then simultaneously retreat from one another, thus giving a to and-fro movement to cutters 51, 52 mount 1 ed on cutter heads 53, 1 on shafts 39, it), all respectively.

Float 37 is provided with a plurality of regularly spaced slots theretlnvmgh whereby a plurality of regularl spaced bars 56 are provided for engagement with correspondingly spaced teeth 57 on cutters El, 52. t aid teeth thus form serrated cutting edges on said cutters, as well known in the art. ill desired, bars 56 may he. chamllered on their corners as at 58, 59 into more or less close contorn'iity with the prolile ol the engaging cutters respectively. l also preterahly curve said cutters 51, 12 in opposite directions, setting shaft 39 oil upper cutter 5.1. slightly forwardly, in the (.lirection of travel of the weh to he cut, of lower shaft 40, so that the pressure oil? cutting will be equal ized on opposite sides of lloat 3T. Cutters Fit, 52 are timed relatively to each other so that the edge points of severance respectively of the tubular wcl) coincide top and hottom. Also said opposite curving of said cutters is ellicient to sever the tubular wet) with the one ply longer at the middle than the. other. thus )roducin a .li) as well known in the art. I have also found that intreastul elliciency and sii'nplicity 01 action may he had by termii'iating float 37 at approxin'iatcly the coi'i'nnon plane (it shalls 3t), 10, wherehy as soon as the tulmlar blank is severed, it is freed from saithlloat.

For ,-scillating' cutter shafts ifor causing eiitters 5t, 52 thereon to coact in the forward portion of their oscillation with lloat 51' during their movement toward each other, .l employ the following means: Segment gear (it is mounted for tree rotation on the outlmard end of sleeve ll, and is engaged and driven by segment gear ('32 similarly mounted on sleeve 4-3. Lower segment gear (32 is provided with a downwardly reaching slotted arm 3 in slot (3 1- of which block (35 slidahly mounted. Said block is pivotally mounted on crank pin (36 of crank disk (37 tixed to the adjacent outboard end of main shalt 12. Said crank pin 66 is slidalily mounted. in slot 38 of said crank disk (37 and may be adjusted rinlially thereof by means ol. s rew (it), as well known in the general art. Thus the revolution of disk (37 will cause segment gears til, (32 to oscillate in unison. For eoumninicating that oscillation to ecccntrically i'nounted shatts 39, 40, .l; ii); to the adjacent outhoard ends thereof, slotted heads, (5t), respectively. In slots ll, 72 thereof l mount sliding blocks '73, 7t and which blocks in turn are pivotally mounted on pins T5, Tl; lixed in segment gears il, 32, all, respectively. in Fig. 10 broken line 77 shows the path of teeth 57 ct cutter 52 when crank pin i located relatively to'shalt', 12 as shown in Fig. 3, and broken line 76, Fig. ll, shows the path of said teeth 57 when rank pin 66 is moved inwardly toward shaft 1'2 as tar as may he, in the 'lorm of arrangement shown in Fig. 2%.

in the modifi ation ol. Fig. 113 l have arranged disk .37 to permitcrank pin i to h moved into coaxial relation with shaft 1 as shown, whmeliy no oscillation ct arms (33 and segn'ient gears til, 2 will he had.

in the modilicalion of l i 's. l land t5 l have moved pivoted blocks 43 it toward. the axes oi their shafts 39, ll) respectively, so as to increase the stroke olf cutters iii. relatively to lloat 3T. lVil'h the modiliod arrangement of Figs. '13, ti and 15, the coaction of cutters 5t, 52 with lloat 37 will he had only by means of the eecentrieall v orlJltul movements of shafts 39, ll). said shafts lining held against rotation by slotted heads (3t), '70, which will. slide up and down on lilocks T 3. Tl and said blocks will. oscillate on pins 7:), To. The. path of loath iii of lower cutter 52 will. then conl'orm to broken line Tl) ol. Fig. 12.

it is chvious that upper cutter lil will have paths ol' travel relatively to the upper lace ol lloat I)? oppositely silniln r to the paths olf lower cutter f2 shown in l igs. 1.0, ll. and l2 respectively.

l: claim:

1. Cutting i-ntichanism including in eoinhination. a lloat, terminating in a plurality ol hars lengthwise said lloal, a pair ol' oppositely disposed cutters having serrated edges for eoactirm top and liolltom respeo lively with the. liars ol. said lloat', said cutters mounted on opposite shalts respectively, and means for moving said cutters lor coaction with said lloat, said lloat liars terminating substantially at the counnon plane of said cutter shafts.

2. Cutting i'nechanism including in comliination, a float, terminating in a plurality oi bars lengthwise said lloat. a pair of oppositely disposed cutters having serrated edges tor coaction top and bottom respectively with the l)tLlS of Said float, said cutters mounted for oscillation on opposite shalts respectively, means for moving said shafts toward and from each other and means ilior oscillating said shafts, said lloat bars terminating substantially at the common plane of said cutter shafts.

3. Cutting mechanisn'l ii'icluding in combination, a lloat, a pair of oppositely disposed cutters for coaction with opposite sides respectively of said float. means tor advancing aluhular well about said lloat and between said cutters, means for oscillating said cutters, and moans for moving said cutters toward and from said lloat.

.-'l-. (hitting mechanism including in comhination, a heat, a pair of op posilely disposed cutters lfor eoaction with opposite sides respectively of said. llo..t-, means for advancing a tubular Web about said [loataud between said cutters, means for oscillatill) ing said cutters, means for moving said cutters toward and from said float, andmeans-for changing the speed of the cutters relatively to the speed of the web.

5. Cutting mechanism including in combination, a float, a pair of oppositely disposed cutters for coaction with opposite sides respectively of said float, means for advancing a tubular. web about said floatand between said cutters, means for oscillating said cutters, means for moving said outters toward and from said float, and .means for changing the speed of advance of the web..

6. Cutting mechanism including in combination, a float, a pair of oppositely disposed cutters for coaction with opposite sides respectively of said float, means for advancing a tubular web about said float and between said cutters, means for oscillating said cutters, means for moving said cutters toward and from said float, means for changing the speed of advance of the web, and means for changing the speed of the cutters relatively to the speed of the web. a

7. Cutting mechanism including in combination, a float, a pair of oppositely disposed cutters for coaction with opposite sides respectively of said float, means for advancing a tubular web about said float and between said cutters, means for oscillating said cutters, means for moving said cutters toward and from said float, and means for changing the length of stroke of said cutters in coaction with said float.

8. Cutting mechanism including in combination, a float, a pair of oppositely disposed cutters for coaction with opposite sides respectively of said float, said cutters mounted on opposite shafts respectively, means for moving said shafts toward and from each other, and means for oscillating said shafts.

9. Cutting mechanism including in combination, a float, a pair of oppositely disposed cutters for coaction Wlt;i1 opposite sides respectively of said float, said cutters mounted on opposite shafts respectively, means for moving said shafts toward and from each other, means for oscillating said shafts, comprising a slotted arm fixed to one of said shafts, and a revolving crank pin for engagement with the slotted arm.

10. (jutting mechanism including in combination, a float, a pair of oppositely disposed cutters for coaction with opposite sides respectively of said float, said cutters mounted for oscillation on opposite shafts I respectively,.means for moving said shafts toward and from each other, means for oscillating said shafts comprising a slotted arm fixed to one ofsaid shafts, a revolvin crank'pin for arm, and means for changing the stroke of said crank pin.

11. Cutting mechanism includin in combination, a float, a pair of oppositely disposed cutters for coaction with opposite sides respectively of said float, said cutters mounted on opposite shafts respectively, -and means for moving said shafts in eccentric orbits.

12. Cutting mechanism including in combination, a float, a pair of oppositely disposed cutters having serrated edges for co-action top and bottom respectively with said float, said floathaving its terminal portions shaped for co-action with the serated edges of said cutters, said cutters being mounted on opposite shafts respectively and means for moving said cutters for coaction with said float, said float terminating substantially at the common plane of said cutter shafts.

13. Cutting mechanism including in combination, a float, a pair of oppositely disposed cutters having serrated edges for coaction top and bottom respectively with said float, said float having its terminal portions shaped for co-action with the serrated edges of said cutters, said cutters being mounted for oscillation on opposite shafts respectively, means for moving said shafts toward and from each other and means for oscillating said shafts, said float terminating substantially at the ter shafts.

14. Cutting mechanism including in combination, afloat, a pair of oppositely posed cutters for co-action with opposite sides respectively of said float, means for advancing a tubular web about said float and between said cutters, means for oscillating said cutters, means for moving said cutters toward for changing the speed of the cutters relatively to thespced of the web and means for changing the length of stroke of said cutters in co-action with said float.

Signed at New York, 7 of December, l91l, before two subscribing witnesses.

CHARLES R SMITH.

\Vi tnesses LAFor Cr. 'BARBER, CHAS. lV. LARUE.

(T engagement with the slotted 1 common plane of said cut- N. Y., this 29th day 

